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Freezer: do not allow freezing processes to clear TIF_SIGPENDING 

Do not allow processes to clear their TIF_SIGPENDING if TIF_FREEZE is set,
so that they will not race with the freezer (like mysqld does, for example).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Nigel Cunningham <nigel@suspend2.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rafael J. Wysocki 2007-10-29 14:37:12 -07:00 committed by Linus Torvalds
parent c8593884f2
commit cc5f916e90
1 changed files with 1 additions and 1 deletions
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2
kernel/signal.c
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@ -124,7 +124,7 @@ void recalc_sigpending_and_wake(struct task_struct *t)
void recalc_sigpending(void)
{
if (!recalc_sigpending_tsk(current))
if (!recalc_sigpending_tsk(current) && !freezing(current))
clear_thread_flag(TIF_SIGPENDING);
}